Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 186, Issue -, Pages 30-36Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2013.11.035
Keywords
Supercapacitor; Battery; Freeze drying; Mesoporous; MnO2
Categories
Funding
- Council of Scientific and Industrial Research (CSIR), Government of India [22(0565)/12/EMR-II]
Ask authors/readers for more resources
The present study investigates in detail the synthesis and characterization of PEDOT: PSS/MnO2 hybrid sponge electrodes for supercapacitor/battery applications. These hybrid sponges were prepared using freeze drying technique and showed hierarchical pores ranging from micron to nanometric size. Scanning electron microscopy-energy dispersive X-ray showed uniform dispersion of MnO2 along the PEDOT: PSS matrix. Thermo gravimetric-differential thermal analysis showed higher thermal stability for these hybrid constructs compared to PEDOT: PSS sponges. From the electrochemical studies, an intrinsic correlation between overall specific capacitance, morphology and weight percentage of MnO2 in the PEDOT: PSS matrix has been defined and explained in KOH electrolyte system. High cyclic stability was observed at the end of 2000 cycles for these hybrid sponges with less than 5 % capacitance fading. These sponges exhibit mass specific capacitance values as high as 10688 F g(-1) which was found to be 35% higher compare to PEDOT: PSS sponges as obtained from Weibull statistics. The application of these electrodes was explored in a fully functional asymmetric coin cell unit where an energy and power density of 200 mWh kg(-1) and 6.4 kW kg(-1), was obtained, respectively. (C) 2013 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available